Although you seem not to have setup a firewall, a test from my site gives:
Connection refused is normally a sign of a firewall somewhere between the internet and your server. If you logon to your server, can you do the telnet locally?

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I have just looked on the server, my mistake it have changed IP to: 87.52.126.13

All the + and - responses are from your server and you should probably see in your logfiles me testing. You can do more tests yourself by using a valid user name on your system and follow a procedure like:

Code:

Type: user "username"
Type: pass "password"
Type: list
You will then get a list over the mails in your mailbox
Type: retr "mailnumber"
You will then see the mail with the mail number
End the session by typing "Quit"

Mind you, that you have a little amount of time before the POP3 server gives up (around 5 seconds, so be prepared and type quickly)

All the + and - responses are from your server and you should probably see in your logfiles me testing. You can do more tests yourself by using a valid user name on your system and follow a procedure like:

Code:

Type: user "username"
Type: pass "password"
Type: list
You will then get a list over the mails in your mailbox
Type: retr "mailnumber"
You will then see the mail with the mail number
End the session by typing "Quit"

Mind you, that you have a little amount of time before the POP3 server gives up (around 5 seconds, so be prepared and type quickly)

Well, the mail client you're using to retrieve mails. Example programs are Oulook, Thunderbird, Eudora to name a few. I assume you're running that on your personal PC. There's no reason to run a POP3 client on your server. POP3 is to retrieve email. If you want to access mail locally on your server, you should use a mail client/tool like 'Mutt'.

Well, the mail client you're using to retrieve mails. Example programs are Oulook, Thunderbird, Eudora to name a few. I assume you're running that on your personal PC. There's no reason to run a POP3 client on your server. POP3 is to retrieve email. If you want to access mail locally on your server, you should use a mail client/tool like 'Mutt'.Yes, as I noticed during my testing. That's oke.

No, Postfix it the Mail Transport Agent, the glue between servers to transport mail. I assume you use a setup like:

Personal PC --> network --> Server

On your server, you run programs like Postfix (to transport mail) and POP3 (to connect the client and the server to retrieve mail). As a substitute for POP3 you can use IMAP. Both serve the same objective, though they use different protocols. For Postfix there are also a couple of other MTA's regularly used, like sendmail. On your PC client( often a windows PC, but other flavors become more and more popular), you use a mail client like Outlook, Outlook Express or Thunderbird to name a few.

To sent mail you use the server directly over the so called SMTP protocol. Thus your Personal PC client software (Outlook, etc) connects over the network with the SMTP protocol to the MTA (Postfix) on the server.

So it's POP3/IMAP to retrieve mail, SMTP to send mail. For POP3/IMAP often a package is used from a team of developers under the name Courier, but there a lots of other options. Perhaps the overwhelming amount of options is a bit scary, but try to read as much as you can. Running a mail server is do-able, but will require a significant learning curve. Try google for more information on setting up a mailserver, mail client usage or similar. I'm pretty sure useful information will popup.

Well, that's because this address is your ADSL home line. You should setup/request a valid domain and next point your MX record to this IP. But I have to warn you: most providers block port 25 (required for MX) on ADSL connections. Not to mention almost everyone blocks incoming mail from such servers.